I like Google+ far more than Facebook. Sparks, and circles, especially Sparks. I like to choose categories to follow, WebDev, NHL hockey, Music genres and whatever else I choose. That way, I receive updates from a big variety of people and sites just by searching a keyword.
I find G+ far more user friendly, and understated yet very functional and intuitive. Facebook bothers me. Whats with these bloody privacy popup boxes every time I check my feed? Bug off, put a link in the menu or sidebar, quit covering up other content I want to see.
G+ has a cleaner interface... I just don't like Facebook, it seems old fashioned already.
I am not very knowledgeable using Social networks, though, and I could be missing things. But for useability, G+ blows FB and Twitter away.
As for traffic, MJ, I'm not reading much on that and it's a surprise to me. I'm not contesting it,, by any means. I agree that right now, G+ is a niche for techy types, but it's still in beta, and invites are sparse. The stat I keep reading is that membership is constantly growing by the millions. Seems like about 10m/month.
G+ should reverse the traffic trend once membership grows big enough, I am sure. 100 mil? Who knows. Right now, until memberships are open, everyone is still on facebook and that's where the action is. People that want sharing among friends have little reason for G+, so after checking it out, they go to FB mostly. I only visit G+ every few days myself, but FB many times, usually for just minutes at a time to see whassup? with gossip or whatever.
Anyways, I think I'll post my invite link on FB